87279739 has 2 divisors, whose sum is σ = 87279740. Its totient is φ = 87279738.

The previous prime is 87279701. The next prime is 87279769. The reversal of 87279739 is 93797278.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 87279739 - 2¹¹ = 87277691 is a prime.

It is not a weakly prime, because it can be changed into another prime (87279769) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 43639869 + 43639870.

It is an arithmetic number, because the mean of its divisors is an integer number (43639870).

Almost surely, 2^87279739 is an apocalyptic number.

87279739 is a deficient number, since it is larger than the sum of its proper divisors (1).

87279739 is an equidigital number, since it uses as much as digits as its factorization.

87279739 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1333584, while the sum is 52.

The square root of 87279739 is about 9342.3626026825. The cubic root of 87279739 is about 443.5791723866.

The spelling of 87279739 in words is "eighty-seven million, two hundred seventy-nine thousand, seven hundred thirty-nine".